The 5-Point Checklist Before Approving a Progressive Lens Order

Before sending a progressive lens order into production, a few minutes of verification are enough to eliminate most causes of remakes and customer returns. Here are the five points to check every time.

1. The frame is adjusted before the measurement, not after

Any centering height measurement taken before the frame's final adjustment on the client's face has to be redone: adjusting the temples or nose pads afterward changes the position of the lens relative to the eye.

2. The client is in a natural position, head level

A head tilted by just a few degrees at the moment of capture skews the centering height without it being visible in the photo. Check alignment before validating, not after.

3. At least two consistent measurements

A single measurement gives you no way to spot an outlier. Two to three readings that cross-check against each other provide a reasonable guarantee that the retained value is reliable.

4. Consistency between distance and near vision

The convergence gap between a distance-vision measurement and a near-vision measurement should match the fixation distance used. An inconsistent gap signals a measurement that needs to be retaken before moving on.

5. The data sent to the supplier matches what was actually measured

• Pupillary distance, monocular if possible (right eye and left eye measured separately)
• Centering height per eye
• Exact reference of the frame and the lens ordered

A data-entry error at the time of ordering — swapping a right-eye and left-eye value, for example — produces exactly the same symptoms for the client as a poorly taken measurement, at the same cost to fix.